On April 10th, 2014, two Greek State Church Metropolitans, Seraphim of Piraeus and Andreas of Dryinoupolis, issued a lengthy 89 page letter addressed to Pope Francis. The pdf of the letter can be found at this link. CatholicCulture.org has also reported on the letter. Met. Seraphim of Piraeus, who was originally consecrated a bishop in the Ecumenical Patriarchate, eventually was installed as the Metropolitan of Piraeus in the State New Calendar Church of Greece (which embraces the ecumenical movement, ironically, and has recently called for a re-launch of ecumenism with Pope Francis!). The issue of Met. Seraphim’s anti-ecumenical campaign was covered about 2 years ago on this site.
Met. Seraphim, in the letter, seems to be possessed of a great admiration for his fellow New Calendarist (and avid proponent of the ecumenical movement), Fr. John Romanides. Fr. John Romanides, as we know, was controversial with many Orthodox. Interestingly, Met. Seraphim seems to launch a somewhat modernist tinged usage of historical criticism in an attack on the idea that Sts. Peter and Paul were ever martyred at Rome (despite all the earliest testimonies by Fathers, ecclesiastical writers, traditions, etc, affirming this).